控轧工艺对小型型钢线Q235C冲击韧性的影响  

EFFECT OF CONTROLLED ROLLING PROCESS ON IMPACT TOUGHNESS OF Q235C STEEL BY SMALL HOT-ROLLED H-BEAM PRODUCTION LINE

作　　者：马永福[1] 于建水 程新超 王文正 马劲红 陈连生 李红斌 田亚强 Ma Yongfu;Yu Jianshui;Cheng Xinchao;Wang Wenzheng;Ma Jinhong;Chen Liansheng;Li Hongbin;Tian Yaqiang(Hebei Jinxi Iron and Steel Group Co.,Ltd.,Tangshan 064300,China;School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,China)

机构地区：[1]河北津西钢铁集团股份有限公司,唐山064300 [2]华北理工大学冶金与能源学院,唐山063009

出　　处：《冶金信息导刊》2021年第2期29-33,共5页Metallurgical Information Review

摘　　要：采用降低C含量、增加Mn、V合金元素含量等成分优化设计,调整加热炉中的加热温度和均热温度,降低轧制温度和精轧轧制速度等工艺措施,研究了河北津西钢铁集团有限公司小型H型钢生产线Q235C低温冲击韧性批次合格率较低的问题。结果表明,经上述调整之后,试验钢的晶粒度由7.5级增加到8.5级~9.0级,混晶现象明显减弱,屈服强度和抗拉强度均有所提高,伸长率略微降低,冲击功合格率明显提高。The Q235C steel low qualified rate of low temperature impact toughness of small H-beam production line of Hebei Jinxi Iron and Steel Group Co.,Ltd.was studied by taking measures including to reduce C content,increase Mn and V alloy elements content,adjust heating temperature and soaking temperature in heating furnace,reduce rolling temperature and finishing rolling speed.The results show that after the above adjustment,the grain size of the experimental steel increases from 7.5 to 8.5~9.0,the mixed crystal phenomenon is obviously weakened,the yield strength and tensile strength are improved,the elongation is reduced slightly,and the qualified rate of low temperature impact toughness is improved obviously.

关 键 词：小型热轧H型钢线 Q235C钢 轧制温度 晶粒度 低温冲击韧性 

分 类 号：TG3[金属学及工艺—金属压力加工]